问题
I'm making a Spring project, where i'm using QueryDsl for the entities. I'm picking up this project from a few months back, where i already had 1 generated class (QUser). Now i made a new entity called Permission, and modified the User entity. When i'm building the project, the QUser doesn't change, and the QPermission class is not generating either. What am i doing wrong? Here's the entity and pom.xml for QueryDsl.
@Entity
@Table(name = "permission")
public class Permission {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "name", length = 100, nullable = false)
private String name;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
And the pom.xml:
[..]
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>com.mysema.maven</groupId>
<artifactId>apt-maven-plugin</artifactId>
<version>1.1.3</version>
<executions>
<execution>
<goals>
<goal>process</goal>
</goals>
<configuration>
<outputDirectory>target/generated-sources/java</outputDirectory>
<processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
[...]
I was following the documentation: http://www.querydsl.com/static/querydsl/3.2.0/reference/html/ch03s03.html I'm using IntellIJ IDEA and tried the "Rebuild project" option as well.
回答1:
Can you show the dependencies you put in your pom.xml ?
I've made some tests starting from scratch
Here are the dependencies :
<dependencies>
...
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-apt</artifactId>
<version>4.2.1</version>
</dependency>
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-jpa</artifactId>
<version>4.2.1</version>
</dependency>
...
</dependencies>
And the plugin :
<plugin>
<groupId>com.mysema.maven</groupId>
<artifactId>apt-maven-plugin</artifactId>
<version>1.1.3</version>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>process</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/generated-sources</outputDirectory>
<processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
</configuration>
</execution>
</executions>
</plugin>
The complete source code I've tried to generate QFiles and that worked :
https://github.com/githubjul/test-so-querydsl
I don't run the project, only compile it to verify it works.
回答2:
Here is a working pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.hello</groupId>
<artifactId>querydsl</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>querydsl</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<querydsl.version>4.1.0</querydsl.version>
</properties>
<dependencies>
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-apt</artifactId>
<version>${querydsl.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-jpa</artifactId>
<version>${querydsl.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate.javax.persistence/hibernate-jpa-2.0-api -->
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>com.mysema.maven</groupId>
<artifactId>apt-maven-plugin</artifactId>
<version>1.1.3</version>
<executions>
<execution>
<goals>
<goal>process</goal>
</goals>
<configuration>
<outputDirectory>target/generated-sources</outputDirectory>
<processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
and the generated class:
/**
* QPermission is a Querydsl query type for Permission
*/
@Generated("com.querydsl.codegen.EntitySerializer")
public class QPermission extends EntityPathBase<Permission> {
private static final long serialVersionUID = -479242270L;
public static final QPermission permission = new QPermission("permission");
public final NumberPath<Long> id = createNumber("id", Long.class);
public final StringPath name = createString("name");
public QPermission(String variable) {
super(Permission.class, forVariable(variable));
}
public QPermission(Path<? extends Permission> path) {
super(path.getType(), path.getMetadata());
}
public QPermission(PathMetadata metadata) {
super(Permission.class, metadata);
}
}
回答3:
Adding the following dependency did it for me:
<dependency>
<groupId>com.mysema.querydsl</groupId>
<artifactId>querydsl-jpa</artifactId>
<version>3.7.4</version>
</dependency>
You can look up the latest version here:
https://mvnrepository.com/artifact/com.mysema.querydsl/querydsl-jpa
来源:https://stackoverflow.com/questions/52905768/java-querydsl-code-generation-does-not-generate-q-class